#include <sys/select.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/un.h>

#include <netinet/in.h>

#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>

#define PORT 5555

#define handle_error_on(stage)\
    do {\
        printf(stage); printf(" error: i\n", errno);\
        return 1;\
    }\
    while(0)

int
main() {

    int sock, ready = 0;
    struct sockaddr_in addr;
    struct timespec timeout = {.tv_sec = 1, .tv_nsec = 0};

    fd_set read;

    addr.sin_family = AF_INET;
    addr.sin_port = htons(PORT);
    addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);

    if (0 > (sock = socket(AF_INET, SOCK_STREAM, 0)))
        handle_error_on("socket stage");

    FD_ZERO(&read);
    FD_SET(sock, &read);

    if (0 > bind(sock, (struct sockaddr*)&addr, sizeof(struct sockaddr_un)))
        handle_error_on("bind stage");

    if (0 > listen(sock, 5))
        handle_error_on("listen stage");

    for (;;) {
        ready = pselect(sock + 1, &read, NULL, NULL, &timeout, NULL);
        if (ready)
            printf("connection arrived");
    }

    return 0;
}